WO2020002431A1 - Wireless power transfer - Google Patents

Wireless power transfer Download PDF

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Publication number
WO2020002431A1
WO2020002431A1 PCT/EP2019/067009 EP2019067009W WO2020002431A1 WO 2020002431 A1 WO2020002431 A1 WO 2020002431A1 EP 2019067009 W EP2019067009 W EP 2019067009W WO 2020002431 A1 WO2020002431 A1 WO 2020002431A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
electronic circuit
power
transfer
wireless
Prior art date
Application number
PCT/EP2019/067009
Other languages
English (en)
French (fr)
Inventor
Martijn Gerarda Lambertus Justinus VAN UDEN
Klaas Jacob Lulofs
Roelf Van Der Wal
Original Assignee
Koninklijke Philips N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips N.V. filed Critical Koninklijke Philips N.V.
Priority to US16/981,303 priority Critical patent/US11735957B2/en
Priority to CN201980043966.4A priority patent/CN112335153A/zh
Priority to JP2020572392A priority patent/JP2021528947A/ja
Priority to EP19732385.0A priority patent/EP3815215A1/de
Publication of WO2020002431A1 publication Critical patent/WO2020002431A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/01—Resonant DC/DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33573—Full-bridge at primary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33584—Bidirectional converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/4815—Resonant converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • a battery is used to power a device when there is no mains power available to power the device.
  • a battery has contacts and these contacts can be contaminated. In some applications, the contamination of contacts can cause problems. This has been addressed in existing systems by fully sealing the battery. However, when the battery is fully sealed, there are no contact points possible. To address this, there are some existing systems in which the power connection between the battery and the device to be powered is wireless. As such, in these existing systems, the battery can wirelessly transfer power to the device. Wireless power transfer is used in many systems. For example, smartphones can be charged by way of wireless power transfer.
  • wireless power transfer suffers from the downside that it is associated with power loss and a voltage drop.
  • the power loss can be compensated to an extent by charging the battery with an external power source either in a wired way or wirelessly, such as in the manner described in US 2017/0133862. Nevertheless, it is not currently possible to compensate for the voltage drop and this can negatively impact the efficiency of wireless power transfer and even the operation of the device that is being charged using wireless power transfer.
  • a battery comprising a first electronic circuit.
  • the first electronic circuit is configured to operate in a transfer mode to wirelessly transfer power to a device and operate in a receive mode to wirelessly receive power from the device.
  • the first electronic circuit may comprise a full bridge converter configured to adapt the voltage gain of the first electronic circuit by being configured to modulate the wireless transfer of power to the device to adapt the voltage gain of the first electronic circuit during the wireless transfer of power to the device when the battery is operating in the transfer mode.
  • the first electronic circuit may comprise a voltage multiplier configured to adapt the voltage gain of the first electronic circuit during the wireless receipt of power from the device when the battery is operating in the receive mode.
  • the voltage multiplier may comprise a part of the full bridge converter operating as the voltage multiplier.
  • the second electronic circuit may be configured to operate in the transfer mode to wirelessly transfer power to the battery at, or about, a frequency at which the voltage gain of the second electronic circuit is independent of a load of the second electronic circuit, wherein the load of the second electronic circuit comprises the battery.
  • the second electronic circuit may be configured to adapt the voltage gain of the second electronic circuit using a transformation ratio during the wireless transfer of power to the battery when the device is operating in the transfer mode.
  • the second electronic circuit may comprise a full bridge converter configured to adapt the voltage gain of the second electronic circuit by being configured to modulate the wireless transfer of power to the battery to adapt the voltage gain of the second electronic circuit during the wireless transfer of power to the battery when the device is operating in the transfer mode.
  • the second electronic circuit may comprise a full bridge rectifier configured to adapt the voltage gain of the second electronic circuit by being configured to rectify the wireless receipt of power from the battery to adapt the voltage gain of the second electronic circuit during the wireless receipt of power from the battery when the device is operating in the receive mode.
  • the full bridge rectifier may comprise a part of the full bridge converter operating as the full bridge rectifier.
  • the second electronic circuit may comprise a voltage multiplier configured to adapt the voltage gain of the second electronic circuit during the wireless receipt of power from the battery when the device is operating in the receive mode.
  • a system comprising the battery described earlier and the device described earlier.
  • a method of operating a battery comprising a first electronic circuit.
  • the first electronic circuit is configured to operate in a transfer mode to wirelessly transfer power to a device and a receive mode to wirelessly receive power from the device.
  • the method comprise adapting a voltage gain of the first electronic circuit to compensate for a voltage drop between the battery and the device during any one or more of the wireless transfer of power to the device when the battery is operating in the transfer mode and the wireless receipt of power from the device when the battery is operating in the receive mode.
  • a method of operating a device comprising a second electronic circuit.
  • the second electronic circuit is configured to operate in a transfer mode to wirelessly transfer power to a battery and a receive mode to wirelessly receive power from the battery.
  • the method comprises adapting a voltage gain of the second electronic circuit to compensate for a voltage drop between the device and the battery during any one or more of the wireless transfer of power to the battery when the device is operating in the transfer mode and the wireless receipt of power from the battery when the device is operating in the receive mode.
  • a computer program product comprising a computer readable medium, the computer readable medium having a computer readable code embodied therein, the computer readable code being configured such that, on execution by a suitable computer or processor, the computer or processor is caused to perform the method described above.
  • a voltage drop between the battery and the device can be compensated by way of the adaptation of the voltage gain of the circuits of the battery and the device.
  • the system can become load independent.
  • the adaptation can be performed bi-directionally such that, irrespective of whether the power transfer is from the battery to the device or from the device to the battery, the voltage drop associated with the power transfer can be compensated. In this way, power can be transferred wirelessly in an efficient manner in either direction and thus both the battery and the device can operate effectively. There are also no additional components needed in order to implement this efficient power transfer.
  • Fig. 2 is a block diagram of a device according to an embodiment
  • Fig. 3 is a block diagram of a system according to an embodiment
  • Fig. 4 is a block diagram of a system according to another embodiment
  • Fig. 5 is a block diagram of a system according to another embodiment
  • the device described herein can be any type of device.
  • the device described herein can be an appliance (such as a home appliance), a mobile device (such as a smart phone, a tablet, a laptop, or any other mobile device), or any other type of device.
  • Fig. 1 illustrates a battery 100 according to an embodiment.
  • the battery 100 comprises a first electronic circuit 102.
  • the first electronic circuit 102 is configured to operate in a transfer mode 302 to wirelessly transfer power to a device 200 and to operate in a receive mode 304 to wirelessly receive power from the device 200.
  • the wireless power transfer can operate in both directions. That is, the wireless power transfer is bi-directional. In this way, the wireless power transfer can operate from the battery 100 to the device 200 (e.g. to supply the device 200 with power from the battery 100) and from the device 200 to the battery 100 (e.g. to charge the battery 100 from the device 200).
  • the first electronic circuit 102 is also configured to adapt a voltage gain of the first electronic circuit 102 to compensate for a voltage drop between the battery 100 and the device 200 during any one or more of the wireless transfer of power to the device 200 when the battery 100 is operating in the transfer mode 302 and the wireless receipt of power from the device 200 when the battery 100 is operating in the receive mode 304.
  • the voltage drop between the battery 100 and the device 200 can be compensated when the battery 100 is operating in the transfer mode 302, in the receive mode 304, or in both the transfer mode 302 and the receive mode 304.
  • the second electronic circuit 202 is also configured to adapt a voltage gain of the second electronic circuit 202 to compensate for a voltage drop between the device 200 and the battery 100 during any one or more of the wireless transfer of power to the battery 100 when the device 200 is operating in the transfer mode 304 and the wireless receipt of power from the battery 100 when the device 200 is operating in the receive mode 302.
  • the voltage drop between the device 200 and the battery 100 can be compensated when the device 200 is operating in the receive mode 302, in the transfer mode 304, or in both the receive mode 302 and the transfer mode 304.
  • Fig. 3 illustrates a system 300 according to an embodiment.
  • the system 300 comprises the battery 100 described earlier with reference to Fig. 1 and device described earlier with reference to Fig. 2.
  • the battery 100 and the device 200 can be wirelessly connected to each other.
  • the battery 100 can be wirelessly detachable from the device 200.
  • the battery 100 and the device 200 can be wirelessly connected to each other via a wireless power link.
  • the wireless power link can be an inductive link through which power is wirelessly transferred.
  • the first electronic circuit 102 of the battery 100 is configured to operate in a transfer mode to wirelessly transfer power to a device 200, while the second electronic circuit 202 is configured to operate in a receive mode to wirelessly receive the power from the battery 100 (illustrated by the arrow 302 in Fig. 3).
  • the second electronic circuit 202 is further configured to operate in a transfer mode to wirelessly transfer power to the battery 100, while the battery 100 is configured to operate in a receive mode to wirelessly receive the power from the device 200 (illustrated by the arrow 304 in Fig. 3).
  • the wireless power transfer can operate in both directions 302, 304. That is, the wireless power transfer is bi-directional. In this way, the wireless power transfer can operate from the battery 100 to the device 200 (e.g. to supply the device 200 with power from the battery 100) and from the device 200 to the battery 100 (e.g. to charge the battery 100 from the device 200).
  • the first electronic circuit 102 is configured to adapt a voltage gain of the first electronic circuit 102 to compensate for a voltage drop between the battery 100 and the device 200 during any one or more of the wireless transfer of power to the device 200 when the battery 100 is operating in the transfer mode 302 and the wireless receipt of power from the device 200 when the battery 100 is operating in the receive mode 304.
  • the second electronic circuit 202 is further configured to adapt a voltage gain of the second electronic circuit 202 to compensate for a voltage drop between the device 200 and the battery 100 during any one or more of the wireless transfer of power to the battery 100 when the device 200 is operating in the transfer mode 304 and the wireless receipt of power from the battery 100 when the device 200 is operating in the receive mode 302.
  • the voltage drop between the battery 100 and the device 200 can be compensated in the receive mode, in the transfer mode or in both the receive mode and the transfer mode.
  • the wireless connection between the battery 100 and the device 200 can act as a galvanic or physical connection with minimal or no voltage drop.
  • Fig. 4 illustrates a system 400 according to another embodiment.
  • the system 400 illustrated in Fig. 4 comprises the battery 100 described earlier with reference to Figs. 1 and 3, according to an embodiment.
  • the system 400 illustrated in Fig. 4 also comprises the device described earlier with reference to Figs. 2 and 3, according to an embodiment.
  • the battery 100 and the device 200 can be wirelessly connected to each other.
  • the battery 100 can be wirelessly detachable from the device 200.
  • the battery 100 and the device 200 can be wirelessly connected to each other via a wireless power link.
  • the wireless power link can be an inductive link through which power is wirelessly transferred.
  • the battery 100 comprises the first electronic circuit 102 described earlier and it will be understood that the first electronic circuit 102 is configured in the manner described earlier with reference to Figs. 1 and 3.
  • the device 200 comprises the second electronic circuit 202 described earlier and it will also be understood that the second electronic circuit 202 is configured in the manner described earlier with reference to Figs. 2 and 3.
  • the first electronic circuit 102 of the battery 100 can comprise a full bridge converter 104.
  • the first electronic circuit 102 is configured to adapt a voltage gain of the first electronic circuit 102 to compensate for a voltage drop between the battery 100 and the device 200 during any one or more of the wireless transfer of power to the device 200 when the battery 100 is operating in the transfer mode and the wireless receipt of power from the device 200 when the battery 100 is operating in the receive mode.
  • Fig. 4 illustrates the wireless transfer of power to the device 200 when the battery 100 is operating in the transfer mode (illustrated by the arrow 402).
  • the battery 100 is powering the device 200 in the embodiment illustrated in Fig. 4.
  • the battery 100 illustrated in Fig. 4 In the embodiment of the battery 100 illustrated in Fig.
  • the full bridge converter 104 of the battery 100 is configured to adapt the voltage gain of the first electronic circuit 102. More specifically, the full bridge converter 104 of the battery 100 can be configured to adapt the voltage gain of the first electronic circuit 102 by being configured to modulate the wireless transfer of power to the device 200 to adapt the voltage gain of the first electronic circuit 102 during the wireless transfer of power to the device 200 when the battery 100 is operating in the transfer mode 402.
  • the full bridge converter 104 of the battery 100 can comprise one or more switches Sl, S2, S3, S4. In some embodiments, the full bridge converter 104 of the battery 100 can be configured to modulate the wireless transfer of power to the device 200 to adapt the voltage gain of the first electronic circuit 102 during the wireless transfer of power to the device 200 using the one or more switches Sl, S2, S3, S4 to adapt the voltage gain of the first electronic circuit 102 during the wireless transfer of power to the device 200 when the battery 100 is operating in the transfer mode 402.
  • a person skilled in the art will understand the general operation of a full bridge converter such as that illustrated in Fig. 4 and the manner in which the full bridge converter 104 can be used to modulate the wireless transfer of power to the device 200.
  • the first electronic circuit 102 may be configured to adapt the voltage gain of the first electronic circuit 102 by phase shift modulation during the wireless transfer of power to the device 200 when the battery 100 is operating in the transfer mode 402.
  • the first electronic circuit 102 can be configured to adapt the voltage gain of the first electronic circuit 102 using a transformation (or transformer) ratio during the wireless transfer of power to the device 200 when the battery 100 is operating in the transfer mode 402.
  • the transformation ratio can, for example, act as a gain in the voltage amplitude.
  • the transformation ratio of the voltage at the battery 100 to the voltage at the device 200 may, for example, be 1 to 1.4 (i.e. 1 :1.4) during the wireless transfer of power the device 200 when the battery 100 is operating in the transfer mode 402. This causes a transformation ratio of the voltage at the device 200 to the voltage at the battery 100 to be 1 to 0.7 (i.e. 1 :0.7) in the opposite direction, i.e. during the wireless transfer of power to the battery 100 when the device 200 is operating in the transfer mode.
  • a voltage multiplier may be used for the opposite direction.
  • the voltage multiplier can, for example, be used such that the
  • transformation ratio can be used to increase the voltage gain in one direction in the system 400. This causes a decrease in the voltage gain in the other direction in the system 400 and thus a voltage multiplier can be used to increase the voltage gain in the other direction in the system 400 (to compensate the down transformation), e.g. by using a voltage multiplier function.
  • a transformation ratio of 1 to 1.4 i.e. 1 :1.4
  • phase shift modulation can be used to control the voltage gain to be 1 to 1 (i.e. 1 : 1) in the system 400 or, more specifically, over the wireless power link in the system 400.
  • the battery 100 may comprise a first inductor Ll and the device 200 may comprise a second inductor L2.
  • the first inductor Ll of the battery 100 and the second inductor L2 of the device 200 can be configured to wirelessly couple the battery 100 and the device 200.
  • the battery 100 may comprise a first capacitor Cl.
  • the first capacitor Cl can be configured to create a series resonance with the first inductor Ll . In this way, the first capacitor Cl and the first inductor Ll can form a first resonance circuit according to some embodiments.
  • the battery 100 can comprise the first resonance circuit.
  • the first resonance circuit may be connected to the full bridge converter 104 of the battery 100 (e.g. to one or more switches Sl, S2, S3, S4 of the full bridge converter 104 of the battery 100 according to some embodiments).
  • the full bridge converter 104 of the battery 100 can be configured to drive the first resonance circuit of the battery 100.
  • the second electronic circuit 202 of the device 200 can comprise a full bridge rectifier 204.
  • the second electronic circuit 202 is configured to adapt a voltage gain of the second electronic circuit 202 to compensate for a voltage drop between the device 200 and the battery 100 during any one or more of the wireless transfer of power to the battery 100 when the device 200 is operating in the transfer mode and the wireless receipt of power from the battery 100 when the device 200 is operating in the receive mode.
  • Fig. 4 illustrates the wireless receipt of power from the battery 100 when the device 200 is operating in the receive mode (illustrated by the arrow 402). In the embodiment of the device 200 illustrated in Fig.
  • the at least one MOSFET may be turned off when the one or more body diodes Dl, D2, D3, D4 are used for rectifying the wireless receipt of power from the battery 100.
  • the second electronic circuit 202 of the device 200 may comprise a full bridge converter.
  • the full bridge converter of the device 200 can take the same form as the full bridge converter 104 of the battery 100 according to some
  • the full bridge converter of the device 200 may be configured to switch to operate as the full bridge rectifier 204 of the device 200.
  • the full bridge rectifier 204 of the device 200 can be realized by operating the full bridge converter of the device 200 in a certain position.
  • a leg of the full bridge converter of the device 200 may be set to the same state.
  • Any leg (e.g. left leg or right leg) of the full bridge converter of the device 200 can be set to the same state.
  • any body diode Dl, D2, D3, D4 of the full bridge converter of the device 200 can be switched on.
  • the leg that is not used for the full bridge rectifier 204 of the device 200 can be used as the full bridge converter of the device 200.
  • the body diodes Dl, D2, D3, D4 used for the full bridge converter of the device 200 can be reused for the full bridge rectifier 204 of the device 200 to provide the extra function of voltage drop compensation.
  • the full bridge rectifier 204 of the device 200 may comprise one or more schottky diodes.
  • the full bridge rectifier 204 of the device 200 also comprises one or more body diodes Dl, D2, D3, D4, the one or more schottky diodes may be in parallel with the one or more body diodes Dl, D2, D3, D4.
  • the full bridge rectifier 204 of the device 200 can be configured to rectify the wireless receipt of power from the battery 100 using one or more schottky diodes to adapt the voltage gain of the second electronic circuit 202 during the wireless receipt of power from the battery 100 when the device 200 is operating in the receive mode 402. In this way, power losses may be minimized.
  • the device 200 may comprise a second capacitor C2.
  • the second capacitor C2 can be configured to create a series resonance with the second inductor L2.
  • the second capacitor C2 and the second inductor L2 can form a second resonance circuit according to some embodiments.
  • the device 200 can comprise the second resonance circuit.
  • the second resonance circuit may be connected to the full bridge rectifier 204 of the device 200, e.g. to one or more body diodes Dl, D2, D3, D4 of the full bridge rectifier 204 of the device 200 according to some embodiments.
  • the first electronic circuit 102 of the battery 100 comprises a voltage multiplier (or voltage multiplier circuit) 106.
  • the voltage multiplier 106 may comprise a voltage multiplier that is configured to double voltage.
  • the voltage multiplier 106 may be a voltage doubler (or voltage doubler circuit).
  • the first electronic circuit 102 is configured to adapt a voltage gain of the first electronic circuit 102 to compensate for a voltage drop between the battery 100 and the device 200 during any one or more of the wireless transfer of power to the battery 100 when the device 200 is operating in the transfer mode and the wireless receipt of power from the battery 100 when the device 200 is operating in the receive mode.
  • Fig. 5 illustrates the wireless transfer of power to the battery 100 when the device 200 is operating in the transmit mode (illustrated by the arrow 404).
  • Fig. 5 illustrates the wireless transfer of power in the opposite direction to Fig. 4.
  • the voltage multiplier 106 of the battery 100 can be configured to adapt the voltage gain of the first electronic circuit 102 during the wireless receipt of power from the device 200 when the battery 100 is operating in the receive mode 404. More specifically, the voltage multiplier 106 of the battery 100 can be configured to adapt the voltage gain of the first electronic circuit 102 by being configured to multiply the wireless receipt of power from the device 200 to adapt the voltage gain of the first electronic circuit 102 during the wireless receipt of power from the device 200 when the battery 100 is operating in the receive mode 404. In this way, the voltage drop associated with the wireless power transfer can be compensated for by the voltage multiplier 106 of the battery 100.
  • the voltage multiplier 106 of the battery 100 can comprise one or more body diodes D6, D7.
  • the voltage multiplier 106 of the battery 100 can comprise one or more body diodes D6, D7 of at least one metal oxide semiconductor field effect transistor (MOSFET).
  • MOSFET metal oxide semiconductor field effect transistor
  • the at least one MOSFET may be turned off when the one or more body diodes D6, D7 of are used for multiplying the wireless receipt of power from the device 200.
  • the battery 100 may comprise a full bridge converter 104.
  • the voltage multiplier 106 of the battery 100 can comprise a part of the full bridge converter 104 operating as the voltage multiplier 106.
  • the full bridge converter 104 of the battery 100 may comprise the one or more body diodes D6, D7 described earlier.
  • the full bridge converter 104 of the battery 100 may be configured to switch to operate as the voltage multiplier 106 of the battery 100.
  • the voltage multiplier 106 of the battery 100 can be realized by operating the full bridge converter 104 of the battery 100 in a certain position.
  • one leg of the full bridge converter 104 of the battery 100 when using the voltage multiplier 106 of the battery 100, one leg of the full bridge converter 104 of the battery 100 may be turned off.
  • the body diodes D6, D7 are of at least one MOSFET
  • the MOSFETs of one leg of the full bridge converter 104 of the battery 100 may be turned off.
  • the other leg of the full bridge converter 104 of the battery 100 can be set to the same state. That is, the other leg of the full bridge converter 104 of the battery 100 may be static.
  • the battery 100 may comprise a first inductor Ll and the device 200 may comprise a second inductor L2.
  • the first inductor Ll of the battery 100 and the second inductor L2 of the device 200 can be configured to wirelessly couple the battery 100 and the device 200.
  • the battery 100 may comprise a first capacitor Cl.
  • the first capacitor Cl can be configured to create a series resonance with the first inductor Ll . In this way, the first capacitor Cl and the first inductor Ll can form a first resonance circuit according to some embodiments.
  • the battery 100 can comprise the first resonance circuit.
  • the first resonance circuit may be connected to the voltage multiplier 106 of the battery 100, e.g. to one or more body diodes D6, D7 of the voltage multiplier 106 of the battery 100 according to some embodiments.
  • the second electronic circuit 202 of the device 200 can comprise a full bridge converter 206.
  • the second electronic circuit 202 is configured to adapt a voltage gain of the second electronic circuit 202 to compensate for a voltage drop between the device 200 and the battery 100 during any one or more of the wireless transfer of power to the battery 100 when the device 200 is operating in the transfer mode and the wireless receipt of power from the battery 100 when the device 200 is operating in the receive mode.
  • Fig. 5 illustrates the wireless transfer of power to the battery 100 when the device 200 is operating in the transfer mode (illustrated by the arrow 404).
  • the device 200 is charging the battery 100 in the embodiment illustrated in Fig. 5.
  • the device 200 illustrated in Fig. 5 In the embodiment of the device 200 illustrated in Fig.
  • the first electronic circuit 102 of the battery 100 comprises the voltage multiplier 106 described earlier.
  • a transformation ratio can be used to adapt the voltage gain in one direction in the system 400 and a voltage multiplier can be used to adapt the voltage gain in the other direction in the system 400.
  • a voltage multiplier can be used to adapt the voltage gain in the other direction in the system 400.
  • transformation ratio can be used to increase the voltage gain in one direction in the system 400. This causes a decrease in the voltage gain in the other direction in the system 400 and thus a voltage multiplier can be used to increase the voltage gain in the other direction in the system 400 (to compensate the down transformation), e.g. by using a voltage multiplier function.
  • a transformation ratio of 1 to 1.4 i.e. 1 :1.4
  • a control option may be employed to control the output voltage at the battery 100.
  • the voltage multiplier 106 of the battery 100 may control the output voltage at the battery 100 according to some embodiments.
  • the output voltage at the battery 100 can be controlled on the output according to some embodiments.
  • the device 200 may comprise a second capacitor C2.
  • the second capacitor C2 can be configured to create a series resonance with the second inductor L2. In this way, the second capacitor C2 and the second inductor L2 can form a second resonance circuit according to some embodiments.
  • the device 200 can comprise the second resonance circuit.
  • the second resonance circuit may be connected to the full bridge converter 206 of the device 200, e.g. to one or more switches S5, S6, S7, S8 of the full bridge converter 206 of the device 200 according to some embodiments.
  • the full bridge converter 206 of the device 200 can be configured to drive the second resonance circuit of the device 200.
  • one leg of the full bridge converter 104 of the battery 100 may be turned off.
  • the switches Sl, S2 of one leg of the voltage multiplier 106 of the battery 100 may be turned off.
  • the MOSFETs of one leg of the full bridge converter 104 of the battery 100 may be turned off.
  • the other leg of the full bridge converter 104 of the battery 100 can be set to the same state. That is, the other leg of the full bridge converter 104 of the battery 100 may be static.
  • any leg (e.g. left leg or right leg) of the full bridge converter 104 of the battery 100 can be set to the same state.
  • the leg that is not used for the voltage multiplier 106 of the battery 100 can be used as the full bridge converter 104 of the battery 100.
  • the second electronic circuit 202 may comprise a voltage multiplier configured to adapt the voltage gain of the second electronic circuit 202 during the wireless receipt of power from the battery 100 when the device 200 is operating in the receive mode.
  • the second electronic circuit 202 of Fig. 4 may comprise such a voltage multiplier instead of the full bridge rectifier 204 according to some embodiments.
  • the second electronic circuit 202 of Fig. 6 may comprise such a voltage multiplier instead of the full bridge rectifier 204 according to some embodiments.
  • the voltage multiplier of the second electronic circuit 202 may operate and/or may be configured in the same manner as described earlier in respect of the voltage multiplier of the first electronic circuit 102.
  • the voltage multiplier of the second electronic circuit 202 may comprise a voltage multiplier that is configured to double voltage.
  • the voltage multiplier of the second electronic circuit 202 may be a voltage doubler (or voltage doubler circuit).
  • the first electronic circuit 102 of the battery 100 can be configured to operate in the transfer mode 302, 402, 602 to wirelessly transfer power to the device 200 at (or about) a frequency at which the voltage gain of the first electronic circuit 102 is independent of a load of the first electronic circuit 102.
  • the load of the first electronic circuit 102 comprises the device 200.
  • the point at which the voltage gain of the first electronic circuit 102 is independent of the load of the first electronic circuit 102 can be referred to as a load independent point. That is, the wireless power can be transferred to the device 200 at a frequency that is at or close to (or near) the load independent point according to some embodiments.
  • the load independent point can comprise the frequency at a second resonance peak of a transfer function of the system 300, 400, 600.
  • the amplitude of this second resonance peak is less dependent on the load of the system 300, 400, 600 than a first resonance peak of a transfer function of the system 300, 400, 600.
  • a method of operating the battery 100 described herein which comprises the first electronic circuit 102 that is configured to operate in a transfer mode 302, 402, 602 to wirelessly transfer power to a device 200 and a receive mode 304,
  • a method of operating the device 200 described herein which comprises the second electronic circuit 202 that is configured to operate in a transfer mode 304, 404, 604 to wirelessly transfer power to a battery 100 and a receive mode 302, 402, 602 to wirelessly receive power from the battery 100.
  • This method comprises adapting a voltage gain of the second electronic circuit 202 to compensate for a voltage drop between the device 200 and the battery 100 during any one or more of the wireless transfer of power to the battery 100 when the device 200 is operating in the transfer mode 304, 404, 604 and the wireless receipt of power from the battery 100 when the device 200 is operating in the receive mode 302, 402, 602.
  • the method may comprise any other steps, and any combination of steps, corresponding to the operation of the device 200 described earlier with reference to Figs. 2, 3, 4, 5, 6 and 7.
  • a computer program product comprising a computer readable medium.
  • the computer readable medium has a computer readable code embodied therein.
  • the computer readable code is configured such that, on execution by a suitable computer or processor, the computer or processor is caused to perform any of the methods described herein.
  • the computer readable medium may be, for example, any entity or device capable of carrying the computer program product.
  • the computer readable medium may include a data storage, such as a ROM (such as a CD-ROM or a semiconductor ROM) or a magnetic recording medium (such as a hard disk).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
PCT/EP2019/067009 2018-06-29 2019-06-26 Wireless power transfer WO2020002431A1 (en)

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US16/981,303 US11735957B2 (en) 2018-06-29 2019-06-26 Wireless power transfer
CN201980043966.4A CN112335153A (zh) 2018-06-29 2019-06-26 无线电力传输
JP2020572392A JP2021528947A (ja) 2018-06-29 2019-06-26 無線電力伝送
EP19732385.0A EP3815215A1 (de) 2018-06-29 2019-06-26 Drahtlose stromübertragung

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EP18180884.1A EP3588736A1 (de) 2018-06-29 2018-06-29 Drahtlose energieübertragung
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EP3815215A1 (de) 2021-05-05
US20210249888A1 (en) 2021-08-12
JP2021528947A (ja) 2021-10-21
US11735957B2 (en) 2023-08-22
EP3588736A1 (de) 2020-01-01

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